The action comes mere months after a jury acquitted Greenpeace protesters who had vandalized the same smokestack. The court ruled that the activists were acting in the public’s interest because the power plant will cause property destruction in the future due to its release of climate-changing greenhouse gases.

So far, Greenpeace says there have been no arrests.

The activists hope to prevent the owners of the plant, E.ON, from going through with their plan to build another coal plant nearby. Greenpeace says the new plant would spew as much greenhouse gas as the world’s 30 least-polluting countries combined. To symbolize this, 30 volunteers carried the flags of those countries into the power plant.

Two of the protesters were among the original ‘Kingsnorth Six,’ who were acquitted of all wrongdoing amid controversy this summer. Police have not reported whether the activists will face charges for today’s action.